forked from OSchip/llvm-project
284 lines
6.9 KiB
ArmAsm
284 lines
6.9 KiB
ArmAsm
//===-- xray_trampoline_x86.s -----------------------------------*- ASM -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file is a part of XRay, a dynamic runtime instrumentation system.
|
|
//
|
|
// This implements the X86-specific assembler for the trampolines.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "../builtins/assembly.h"
|
|
#include "../sanitizer_common/sanitizer_asm.h"
|
|
|
|
|
|
|
|
.macro SAVE_REGISTERS
|
|
pushfq
|
|
subq $240, %rsp
|
|
CFI_DEF_CFA_OFFSET(248)
|
|
movq %rbp, 232(%rsp)
|
|
movupd %xmm0, 216(%rsp)
|
|
movupd %xmm1, 200(%rsp)
|
|
movupd %xmm2, 184(%rsp)
|
|
movupd %xmm3, 168(%rsp)
|
|
movupd %xmm4, 152(%rsp)
|
|
movupd %xmm5, 136(%rsp)
|
|
movupd %xmm6, 120(%rsp)
|
|
movupd %xmm7, 104(%rsp)
|
|
movq %rdi, 96(%rsp)
|
|
movq %rax, 88(%rsp)
|
|
movq %rdx, 80(%rsp)
|
|
movq %rsi, 72(%rsp)
|
|
movq %rcx, 64(%rsp)
|
|
movq %r8, 56(%rsp)
|
|
movq %r9, 48(%rsp)
|
|
movq %r10, 40(%rsp)
|
|
movq %r11, 32(%rsp)
|
|
movq %r12, 24(%rsp)
|
|
movq %r13, 16(%rsp)
|
|
movq %r14, 8(%rsp)
|
|
movq %r15, 0(%rsp)
|
|
.endm
|
|
|
|
.macro RESTORE_REGISTERS
|
|
movq 232(%rsp), %rbp
|
|
movupd 216(%rsp), %xmm0
|
|
movupd 200(%rsp), %xmm1
|
|
movupd 184(%rsp), %xmm2
|
|
movupd 168(%rsp), %xmm3
|
|
movupd 152(%rsp), %xmm4
|
|
movupd 136(%rsp), %xmm5
|
|
movupd 120(%rsp) , %xmm6
|
|
movupd 104(%rsp) , %xmm7
|
|
movq 96(%rsp), %rdi
|
|
movq 88(%rsp), %rax
|
|
movq 80(%rsp), %rdx
|
|
movq 72(%rsp), %rsi
|
|
movq 64(%rsp), %rcx
|
|
movq 56(%rsp), %r8
|
|
movq 48(%rsp), %r9
|
|
movq 40(%rsp), %r10
|
|
movq 32(%rsp), %r11
|
|
movq 24(%rsp), %r12
|
|
movq 16(%rsp), %r13
|
|
movq 8(%rsp), %r14
|
|
movq 0(%rsp), %r15
|
|
addq $240, %rsp
|
|
popfq
|
|
CFI_DEF_CFA_OFFSET(8)
|
|
.endm
|
|
|
|
.macro ALIGNED_CALL_RAX
|
|
// Call the logging handler, after aligning the stack to a 16-byte boundary.
|
|
// The approach we're taking here uses additional stack space to stash the
|
|
// stack pointer twice before aligning the pointer to 16-bytes. If the stack
|
|
// was 8-byte aligned, it will become 16-byte aligned -- when restoring the
|
|
// pointer, we can always look -8 bytes from the current position to get
|
|
// either of the values we've stashed in the first place.
|
|
pushq %rsp
|
|
pushq (%rsp)
|
|
andq $-0x10, %rsp
|
|
callq *%rax
|
|
movq 8(%rsp), %rsp
|
|
.endm
|
|
|
|
.text
|
|
#if !defined(__APPLE__)
|
|
.section .text
|
|
.file "xray_trampoline_x86.S"
|
|
#else
|
|
.section __TEXT,__text
|
|
#endif
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
.globl ASM_SYMBOL(__xray_FunctionEntry)
|
|
.align 16, 0x90
|
|
ASM_TYPE_FUNCTION(__xray_FunctionEntry)
|
|
# LLVM-MCA-BEGIN __xray_FunctionEntry
|
|
ASM_SYMBOL(__xray_FunctionEntry):
|
|
CFI_STARTPROC
|
|
SAVE_REGISTERS
|
|
|
|
// This load has to be atomic, it's concurrent with __xray_patch().
|
|
// On x86/amd64, a simple (type-aligned) MOV instruction is enough.
|
|
movq ASM_SYMBOL(_ZN6__xray19XRayPatchedFunctionE)(%rip), %rax
|
|
testq %rax, %rax
|
|
je .Ltmp0
|
|
|
|
// The patched function prologue puts its xray_instr_map index into %r10d.
|
|
movl %r10d, %edi
|
|
xor %esi,%esi
|
|
ALIGNED_CALL_RAX
|
|
|
|
.Ltmp0:
|
|
RESTORE_REGISTERS
|
|
retq
|
|
# LLVM-MCA-END
|
|
ASM_SIZE(__xray_FunctionEntry)
|
|
CFI_ENDPROC
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
.globl ASM_SYMBOL(__xray_FunctionExit)
|
|
.align 16, 0x90
|
|
ASM_TYPE_FUNCTION(__xray_FunctionExit)
|
|
# LLVM-MCA-BEGIN __xray_FunctionExit
|
|
ASM_SYMBOL(__xray_FunctionExit):
|
|
CFI_STARTPROC
|
|
// Save the important registers first. Since we're assuming that this
|
|
// function is only jumped into, we only preserve the registers for
|
|
// returning.
|
|
subq $56, %rsp
|
|
CFI_DEF_CFA_OFFSET(64)
|
|
movq %rbp, 48(%rsp)
|
|
movupd %xmm0, 32(%rsp)
|
|
movupd %xmm1, 16(%rsp)
|
|
movq %rax, 8(%rsp)
|
|
movq %rdx, 0(%rsp)
|
|
movq ASM_SYMBOL(_ZN6__xray19XRayPatchedFunctionE)(%rip), %rax
|
|
testq %rax,%rax
|
|
je .Ltmp2
|
|
|
|
movl %r10d, %edi
|
|
movl $1, %esi
|
|
ALIGNED_CALL_RAX
|
|
|
|
.Ltmp2:
|
|
// Restore the important registers.
|
|
movq 48(%rsp), %rbp
|
|
movupd 32(%rsp), %xmm0
|
|
movupd 16(%rsp), %xmm1
|
|
movq 8(%rsp), %rax
|
|
movq 0(%rsp), %rdx
|
|
addq $56, %rsp
|
|
CFI_DEF_CFA_OFFSET(8)
|
|
retq
|
|
# LLVM-MCA-END
|
|
ASM_SIZE(__xray_FunctionExit)
|
|
CFI_ENDPROC
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
.globl ASM_SYMBOL(__xray_FunctionTailExit)
|
|
.align 16, 0x90
|
|
ASM_TYPE_FUNCTION(__xray_FunctionTailExit)
|
|
# LLVM-MCA-BEGIN __xray_FunctionTailExit
|
|
ASM_SYMBOL(__xray_FunctionTailExit):
|
|
CFI_STARTPROC
|
|
SAVE_REGISTERS
|
|
|
|
movq ASM_SYMBOL(_ZN6__xray19XRayPatchedFunctionE)(%rip), %rax
|
|
testq %rax,%rax
|
|
je .Ltmp4
|
|
|
|
movl %r10d, %edi
|
|
movl $2, %esi
|
|
|
|
ALIGNED_CALL_RAX
|
|
|
|
.Ltmp4:
|
|
RESTORE_REGISTERS
|
|
retq
|
|
# LLVM-MCA-END
|
|
ASM_SIZE(__xray_FunctionTailExit)
|
|
CFI_ENDPROC
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
.globl ASM_SYMBOL(__xray_ArgLoggerEntry)
|
|
.align 16, 0x90
|
|
ASM_TYPE_FUNCTION(__xray_ArgLoggerEntry)
|
|
# LLVM-MCA-BEGIN __xray_ArgLoggerEntry
|
|
ASM_SYMBOL(__xray_ArgLoggerEntry):
|
|
CFI_STARTPROC
|
|
SAVE_REGISTERS
|
|
|
|
// Again, these function pointer loads must be atomic; MOV is fine.
|
|
movq ASM_SYMBOL(_ZN6__xray13XRayArgLoggerE)(%rip), %rax
|
|
testq %rax, %rax
|
|
jne .Larg1entryLog
|
|
|
|
// If [arg1 logging handler] not set, defer to no-arg logging.
|
|
movq ASM_SYMBOL(_ZN6__xray19XRayPatchedFunctionE)(%rip), %rax
|
|
testq %rax, %rax
|
|
je .Larg1entryFail
|
|
|
|
.Larg1entryLog:
|
|
|
|
// First argument will become the third
|
|
movq %rdi, %rdx
|
|
|
|
// XRayEntryType::LOG_ARGS_ENTRY into the second
|
|
mov $0x3, %esi
|
|
|
|
// 32-bit function ID becomes the first
|
|
movl %r10d, %edi
|
|
ALIGNED_CALL_RAX
|
|
|
|
.Larg1entryFail:
|
|
RESTORE_REGISTERS
|
|
retq
|
|
# LLVM-MCA-END
|
|
ASM_SIZE(__xray_ArgLoggerEntry)
|
|
CFI_ENDPROC
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
.global ASM_SYMBOL(__xray_CustomEvent)
|
|
.align 16, 0x90
|
|
ASM_TYPE_FUNCTION(__xray_CustomEvent)
|
|
# LLVM-MCA-BEGIN __xray_CustomEvent
|
|
ASM_SYMBOL(__xray_CustomEvent):
|
|
CFI_STARTPROC
|
|
SAVE_REGISTERS
|
|
|
|
// We take two arguments to this trampoline, which should be in rdi and rsi
|
|
// already.
|
|
movq ASM_SYMBOL(_ZN6__xray22XRayPatchedCustomEventE)(%rip), %rax
|
|
testq %rax,%rax
|
|
je .LcustomEventCleanup
|
|
|
|
ALIGNED_CALL_RAX
|
|
|
|
.LcustomEventCleanup:
|
|
RESTORE_REGISTERS
|
|
retq
|
|
# LLVM-MCA-END
|
|
ASM_SIZE(__xray_CustomEvent)
|
|
CFI_ENDPROC
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
.global ASM_SYMBOL(__xray_TypedEvent)
|
|
.align 16, 0x90
|
|
ASM_TYPE_FUNCTION(__xray_TypedEvent)
|
|
# LLVM-MCA-BEGIN __xray_TypedEvent
|
|
ASM_SYMBOL(__xray_TypedEvent):
|
|
CFI_STARTPROC
|
|
SAVE_REGISTERS
|
|
|
|
// We pass three arguments to this trampoline, which should be in rdi, rsi
|
|
// and rdx without our intervention.
|
|
movq ASM_SYMBOL(_ZN6__xray21XRayPatchedTypedEventE)(%rip), %rax
|
|
testq %rax,%rax
|
|
je .LtypedEventCleanup
|
|
|
|
ALIGNED_CALL_RAX
|
|
|
|
.LtypedEventCleanup:
|
|
RESTORE_REGISTERS
|
|
retq
|
|
# LLVM-MCA-END
|
|
ASM_SIZE(__xray_TypedEvent)
|
|
CFI_ENDPROC
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
NO_EXEC_STACK_DIRECTIVE
|